Mock API
Everything you need
Design mock endpoints, generate OpenAPI specs, and learn API concepts. Everything you need to accelerate your API development workflow.
Everything You Need
Powerful tools to design, document, and understand APIs
OpenAPI Designer
Visually design your API endpoints and export as OpenAPI 3.0 spec in YAML or JSON.
API Dictionary
Learn about REST, endpoints, mock servers, and other essential API concepts.
Mock Data Generator
Generate realistic mock data for 20+ domains. Users, Products, Orders and more.
How It Works
Three simple steps to create your API spec
Design
Choose your HTTP method, define the path, and add parameters.
Configure
Set up request body, response schema, and example values.
Export
Download your OpenAPI spec as YAML or JSON. Ready to use.
Learn API Concepts
Understand the terminology behind modern APIs
GraphQL
A query language for APIs that allows clients to request exactly the data they need.
Idempotency
A property where making the same API request multiple times produces the same result.
WebSocket
A protocol enabling full-duplex, real-time communication between client and server.
API Testing
The process of verifying that APIs work correctly, securely, and perform well.